2017 Peterbilt 389 Wiper Blade Sizes: Your Ultimate Replacement Guide

Keeping the windshield of your heavy-duty rig clear is a matter of safety, especially when you are putting on the miles. If you are driving a 2017 Peterbilt 389, maintaining optimal visibility through that classic split windshield means staying on top of your wiper blade maintenance. As a parts counter expert, I've put together this comprehensive guide to help you find the exact wiper blades you need for your 389, along with the best replacement options and installation tips.

Quick reference

For the classic flat glass of the 2017 Peterbilt 389, both the driver and passenger sides use the same size blade. Since this is a heavy-duty tractor, there is no rear wiper equipped. Note: OEM part numbers can vary by exact fleet spec; consult your dealer for original PNs.

Best aftermarket replacements

When it comes to replacing the blades on your Peterbilt, you want something that can handle highway speeds, bug strikes, and harsh weather. While heavy-duty specific blades are often recommended for big rigs, here is how the top premium aftermarket lines stack up (note: you may need heavy-duty adapters depending on your exact wiper arm):

• Trico Force: (Mid-to-High Tier) Excellent high-speed wind performance, which is ideal for highway driving in a semi. Trico also offers a dedicated Heavy Duty line for commercial trucks.
• Bosch ICON: (Premium Tier) A beam-style blade known for incredible longevity and all-weather performance. It resists ice and snow buildup better than traditional frame blades.
• Rain-X Latitude: (Premium Tier) Features a water-repelling coating that transfers to your windshield, making water bead up and roll right off.
• Michelin Stealth: (Mid Tier) A hybrid blade that combines the flexibility of a beam blade with the structural integrity of a traditional frame.
• PIAA Si-Tech: (Premium Tier) Silicone blades that outlast standard rubber and provide continuous water-repellent action.

Attachment style

The 2017 Peterbilt 389 typically utilizes a Heavy-Duty J-hook or a Saddle attachment, which is standard for many Class 8 trucks. Unlike standard passenger car J-hooks, heavy-duty arms are often wider (usually 9x4 or larger). When buying premium aftermarket blades like the Bosch ICON or Rain-X Latitude, ensure the package includes a heavy-duty hook adapter, or look for truck-specific lines if your rig uses the wider saddle mount.

How to install

Swapping the blades on a Peterbilt 389 is straightforward, though you'll need to reach over the hood to access the split windshield.

1. Pull the wiper arm away from the windshield until it locks in the upright position.
2. For a J-hook attachment, locate the release tab where the blade meets the arm. Press the tab and push the blade down toward the base of the arm to slide it out of the hook.
3. If you have a saddle mount, you may need to remove a small retaining screw or bolt holding the blade in the saddle.
4. Position the new blade's adapter into the hook (or saddle) and pull it upward until you hear it click securely into place.
5. Gently lower the wiper arm back onto the glass. Do not let it snap back, as this could crack your windshield.
6. Repeat for the passenger side.

When to replace

For over-the-road trucks like the Peterbilt 389, wiper blades endure a massive amount of wear and tear. You should plan to replace your wiper blades every 6 to 12 months. However, if you log extreme miles, you might need to change them sooner. Watch out for these telltale signs of failure:

• Streaking: Leaving lines of water behind, indicating cracked or hardened rubber.
• Chattering: The blade skips across the glass with a loud stuttering sound.
• Smearing: Spreading water or bug debris rather than clearing it.

Need wipers swapped fast? Find a shop on Repairius.